P

Pachycaul [ Botany ]

Pad [ Botany ]

Paedomorphosis [ Biology ]

Palisade [ Botany ]

Palmate - Palmately [ Botany ]

Papilla - Papillose [ Botany ]

Pappus [ Botany ]

Papyraceous [ Botany ]

Paralectotype [ Taxonomy ]

Parallel [ Botany ]

Parallel evolution [ Biology ]

Paraneotype [ Taxonomy ]

Parapatric [ Biology ]

Paraphyletic [ Taxonomy ]

Parasite - Parasitism [ Biology - Horticulture - Phytoparasitology ]

Parasitic plant [ Biology - Horticulture ]

Parasitoid [ Biology]

Parastich - Parastichy [ Botany ]

Paratype [ Taxonomy ]

Parenchyma  [ Botany ]

Parent [ Biology ]

Parietal [ Botany ]

Parietal placentation [ Botany ]

Paripinnate [ Botany ]

Parthenocarpy - Partenocarpic [ Botany ]

Pathogen [ Pathology ]

Pathology [ Biology ]

Pattern [ Botany - Morphology]

Peat and Peat moss [ Horticulture - Pedology ]

Pectin [ Botany - Biochemistry ]

Pectinate [ Botany ]

Pedicel - Pedicle [ Botany ]

Pedicellate [ Botany ]

Pedicelliformis [ Botany ]

Pedigreed [ Genetics ]

Pedology [ Pedology ]

Peduncle [ Botany ]

Pedunculate [ Botany ]

Pellucid [ Botany ]

Peltate - Peltation [ Botany ]

Penetrance [ Genetics ]

Penniveined [ Botany ]

Pepo [ Botany ]

Perennating (organs) [ Botany ]

Perennial (plant) [ Botany ]

Perfect (Flower) [ Botany ]

Perforation plate [ Botany ]

Perianth [ Botany ]

Pericarp [ Botany ]

Pericarpel [ Botany ]

Pericycle [ Botany ]

Periderm [ Botany ]

Perigynous [ Botany ]

Perlite [ Horticulture ]

Permeable [ Biology - Horticulture - Pedology ]

Persistent [ Botany ]

Pest [ Biology - Agronomy - Phytopathology]

Pest-free [ Horticulture - Phytopathology]

Pest tolerance [ Botany - Biology - Genetics - Phytopathology ]

Pesticide [ Chemistry - Agronomy - Phytopathology ]

Petals [ Botany ]

Petaloid [ Botany ]

Petiolate [ Botany ]

Petiole [ Botany ]

Petiolule [ Botany ]

pH [ Chemistry ]

Phalaenophily[ Botany]

Phanerogams[ Botany]

Phase [ Biology -Physics]

Phellem [ Botany ]

Phelloderm [ Botany ]

Phenolic compounds  [ Botany- Physiology ]

Phenology [ Botany ]

Phenomenon  [ Botany ]

Phenotype [ Biology ]

Phloem [ Botany ]

Phosphorus [ Physiology - Chemistry ]

Photoperiod [ Botany - Biology - Horticulture ]

Photosynthesis [ Botany - Physiology ]

Photosynthesizing surface  [ Botany ]

Phylloclade [ Botany ]

Phyllotaxis [ Botany ]

Phylogenesis - Phylogeny [ Biology ]

Phylogenetic tree [ Taxonomy ]

Phylum [ Taxonomy ]

Physical [ Biology ]

Physics [ Natural sciences ]

Physiology [ Biology ]

Phytochemicals [ Agronomy - Horticulture ]

Phytochrome [ Botany - Physiology ]

Phytogenic [ Biology - Ecology ]

Phytohormones  [ Botany - Physiology - Horticulture ]

Phytoparasitology  [ Botany - Horticulture ]

Phytopathogen [ Botany - Phytopathology ]

Phytopathology [ Natural sciences - Botany ]

Phytophagous [ Ecology ]

Phytophthora [ Phytopathology ]

Phytium [ Phytopathology ]

Phytoregulators [ Botany - Physiology - Horticulture ]

Pigment [ Botany - Biology]

Pinna [ Botany ]

Pinnate [ Botany ]

Pinnula [ Botany ]

Piriform [ Botany ]

Pistil [ Botany ]

Pistillate (Flower) [ Botany ]

Pistilline [ Botany ]

Pistillode [ Botany ]

Pit [ Botany ]

Placenta [ Botany ]

Placentation [ Botany ]

Plant [ Botany ]

Planting [ Horticulture ]

Plantlet [ Botany ]

Plastic pot [ Horticulture ]

Platyopuntia [ Botany ]

Plumose (or Plumate, Plumed, plume-like) [ Botany ]

Plumule [ Botany ]

Pluvial forest [ Ecology ]

Poaceae [ Botany ]

Pod [ Botany ]

Podarium - Podaria [ Botany ]

Poikilohydric  [ Botany ]

Poison [ Agronomy - Biology ]

Pollen [ Botany ]

Pollen tube [ Botany ]

Pollinarium - Pollinaria [ Botany ]

Pollination [ Botany ]

Pollination syndromes [ Botany ]

Pollinator [ Botany ]

Pollinium - Pollinia [ Botany ]

Pollution [ Ecology ]

Polycephalous [ Botany ]

Polydrupe [ Botany ]

Polymer [ Chemistry ]

Polymorphism - Polymorph [ Botany - Biology ]

Polyphyletic [ Taxonomy ]

Polyploidy - Polyploid [ Botany ]

Polysaccharide [ Botany - Biochemistry]

Polystyrene [ Horticulture ]

Polytomy [ Botany - Taxonomy - Cladistic ]

Pome [ Botany ]

Population [ Botany ]

Pore - Porose [ Botany ]

Porrect [ Botany ]

Portulacaceae [ Botany ]

Pot [ Horticulture ]

Pot-bound [ Horticulture ]

Potassium [ Physiology - Chemistry ]

Potting [ Horticulture ]

Potting-down [ Horticulture ]

Potting mix [ Horticulture ]

Potting-up [ Horticulture ]

Prairie [ Ecology - Biogeography ]

Pre- [ Prefix ]

Pre-desert [ Botany ]

Precipitation [ Meteorology - Ecology ]

Precursor [ Biology ]

Predation [ Ecology ]

Prefix [ Used in biological terminology]

Premature [ Biology ]

Pressure [ Physics ]

Prevention [ Horticulture - Phytopathology ]

Prickle - Prickly [ Botany ]

Prickly-pear [ Botany ]

Primary [ Botany ]

Primary elements [ Botany ]

Primary growth [ Botany ]

Primary leaf [ Botany ]

Primary meristem [ Botany ]

Primary root [ Botany ]

Primary sexual characteristics [ Biology - Botany ]

Primary tissues [ Botany ]

Primary xilem [ Botany ]

Primitive [ Botany ]

Primordium - Primordia [ Botany ]

Process [ Biology - Physiology ]

Procreation [ Biology]

Procreation [ Botany]

Producer [ Ecology ]

Profile (of soil) [ Pedology ]

Progeny [ Biology ]

Prokaryote [ Biology ]

Prolate [ Botany ]

Proliferation [ Biology ]

Proliferative growth [ Botany - Biology - Horticulture ]

Promeristem [ Botany ]

Promotor [ Biology - Genetics ]

Propagation [ Biology - Horticulture ]

Propagule [ Botany ]

Propositus [ Taxonomy ]

Prostrate [ Botany ]

Protein [ Biology - Physiology - Biochemistry ]

Protologue [ Taxonomy ]

Protoplasm [ Biology ]

Protozoan [ Biology ]

Proximal [ Botany ]

Pruina - Pruinose [ Botany ]

Pruning [ Agronomy - Horticulture ]

Pseudanthium (Pl. Pseudanthia) [ Botany ]

Pseudobulb [ Botany ]

Pseudocarp [ Botany ]

Pseudoapical - Pseudoterminal [ Botany ]

Pseudocephalium (Pl. Pseudocephalia) [ Botany ]

Puberulent - Puberulous  [ Botany ]

Pubescence - Pubescent [ Botany ]

Publication [ Taxonomy ]

Pulp - Pulpy [ Botany ]

Pulvinus - Pulvinate [ Botany ]

Pumice [ Geology - Horticulture ]

Punctate [ Botany ]

Pup [ Botany ]

Purebred - Purebreeding [ Botany ]

Pyriform [ Botany ]